topical media & game development
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game-xna-intro-XnaGraphicEngineChapter7-Game-RotationCamera.cs / cs



  // Project: XnaGraphicEngine, File: SimpleCamera.cs
  // Namespace: XnaGraphicEngine.Game, Class: SimpleCamera
  // Path: C:\code\Xna\XnaGraphicEngine\Game, Author: Abi
  // Code lines: 126, Size of file: 3,06 KB
  // Creation date: 13.03.2007 22:57
  // Last modified: 16.03.2007 05:02
  // Generated with Commenter by abi.exDream.com
  
  #region Using directives
  using Microsoft.Xna.Framework;
  using System;
  using System.Collections.Generic;
  using System.Text;
  using XnaGraphicEngine.Helpers;
  #endregion
  
  namespace XnaGraphicEngine.Game
  {
<summary> Simple rotation camera class just to rotate around a little. Always focuses on the center and uses the same direction vector, which is only rotate around the z axis. </summary> public class RotationCamera : GameComponent { #region Variables Vector3 initialPos = new Vector3(0, 15, 15), cameraPos; float rotation = 0; float distance = 1.0f; #endregion 

                  #region Constructor
                  public RotationCamera(BaseGame game)
                          : base(game)
                  {
                  } // RotationCamera(game)
                  #endregion
  
                  #region Initialize
                  public override void Initialize()
                  {
                          base.Initialize();
                  } // Initialize
                  #endregion
  
                  #region Update
                  public override void Update(GameTime gameTime)
                  {
                          base.Update(gameTime);
  
                          // Update camera position (allow mouse and gamepad)
                          rotation += BaseGame.MoveFactorPerSecond / 1.75f;
                          cameraPos = Vector3.Transform(initialPos*distance,
                                  Matrix.CreateRotationZ(rotation));
  
                          // Allow zooming in/out with gamepad, mouse wheel and cursor keys.
                          distance += Input.GamePad.ThumbSticks.Left.Y;
                          distance += Input.MouseWheelDelta / 2000.0f;
                          if (Input.KeyboardDownPressed)
                                  distance += BaseGame.MoveFactorPerSecond / 2.5f;
                          if (Input.KeyboardUpPressed)
                                  distance -= BaseGame.MoveFactorPerSecond / 2.5f;
                          if (distance < 0.01f)
                                  distance = 0.01f;
                          if (distance > 10)
                                  distance = 10;
  
                          BaseGame.ViewMatrix = Matrix.CreateLookAt(
                                  cameraPos, new Vector3(0, 0, 0), new Vector3(0, 1, 0));
                  } // Update(gameTime)
                  #endregion
          } // class SimpleCamera
  } // namespace XnaGraphicEngine.Game
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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